Re: the right way to draw in a drawingarea

[Paul Davis <pjdavis engineering uiowa edu>]

Paul Davis wrote:

> Paul Davis wrote:
>
> > Paul Davis wrote:
> >
> > > On Wed, 2005-10-12 at 00:17 -0500, the other Paul Davis wrote:
> > >  
> > >
> > > > The complexities abound.  Insert apropriate quote here.  I can't 
> > > > explain the gtk drawing system because I don't entirely understand 
> > > > it.  I'm glad hings are working.
> > > >   
> > >
> > >
> > >
> > > there is really nothing mysterious is you remember one simple rule:
> > >
> > >     draw on your widget's window ONLY in an expose event handler.
> > >
> > > the point of queue_draw() is to request that the GTK event loop
> > > schedules an "artificial" expose event at an appropriate time.
> > > otherwise, you don't have an expose event available to make whatever
> > > change it is that you want to make. drawing on widgets' windows from
> > > anywhere else is wrong, and will lead to unpredictable results.
> > >
> > > --p (the other other Paul Davis)
> > >
> > >
> > >
> > >  
> > Wow.  I was getting really confused for a second wondering how it is 
> > that I'm writing emails I don't remember.
> >
> > Anyway, I agree exactly with what Other Paul is saying.  I just don't 
> > know why it's so.  Other than its the way things were intended.
> >
> > I'll take a look at adding to an example.
> >
> > Paul
>
> _______________________________________________
> gtkmm-list mailing list
> gtkmm-list gnome org
> http://mail.gnome.org/mailman/listinfo/gtkmm-list

And its early.  Forgot to send that to the list.

I'm looking at adding some drawing code to the rulers example unless 
someone has a beter example in mind.  Question is, has anyone noticed 
the funky behavior in that example when the window is resized?  I think 
adding a handler for the size allocate handler and resettiing the size 
of the rulers should do the trick.

Paul